The Central Nervous System is composed of the brain and spinal cord.
The Peripheral Nervous System sends signals to our voluntary muscles which allow us to move and take care of our needs.
Axons are the "information super highway" of the nervous system. They transmit messages over substantial distances within the body.
Myelin prohibits nervous system signals from traveling too far down an axon.
MS gradually destroys myelin sheaths in the CNS impeding the conduction of nerve impulses.